/*
 * Copyright 2010 GP Software
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * CsvConfigMapper.java | Created on Apr 22, 2010
 */
package org.gp.gpetl.mapper;

import org.gp.gpetl.config.BeanMapping;
import org.gp.gpetl.config.ConfigObject;
import org.gp.gpetl.config.FileMappingConfig;
import org.gp.gpetl.exception.MappingException;

import java.util.HashMap;
import java.util.Map;

/**
 * ConfigMapper class for CSV files
 *
 * @author Paul Augustine C. Mendoza
 * @since 1.0
 */
public class CsvConfigMapper extends AbstractConfigMapper {

    /**
     * The configuration cache
     */
    private static Map<String, BeanMapping> configCache =
            new HashMap<String, BeanMapping>();


    /**
     * @see org.gp.gpetl.mapper.ConfigMapper#getConfig(String)
     */
    public ConfigObject getConfig(String key) throws MappingException {
        if (configCache.isEmpty()) {
            initializeConfig();
        }
        return configCache.get(key);
    }

    /**
     * @see org.gp.gpetl.mapper.AbstractConfigMapper#processConfigObject(org.gp.gpetl.config.ConfigObject)
     */
    @Override
    protected void processConfigObject(ConfigObject configObject) {
        FileMappingConfig mappingConfig = (FileMappingConfig) configObject;        
        for (BeanMapping beanMapping : mappingConfig.getMappings()) {
            configCache.put(beanMapping.getName(), beanMapping);
        }
    }

    /**
     * @see ConfigMapper#clearConfigCache()
     */
    public void clearConfigCache() {
        configCache.clear();        
    }
}
